%0 Journal Article
%A Quintas, Louis V.
%A Supnick, Fred
%T Extrema in Space-Time
%J Canadian journal of mathematics
%D 1966
%P 678-691
%V 18
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1966-069-1/
%R 10.4153/CJM-1966-069-1
%F 10_4153_CJM_1966_069_1